Mixed Lossless Audio Compression

1. In an audio decoder, a method comprising: receiving at the audio decoder, first encoded audio information and second encoded audio information in a bit stream for audio in multiple channels, the first and second audio information having been encoded based on an MDCT of input audio data, wherein the first encoded audio information is further based on plural lossy mode coding processes that include perceptual weighting and entropy coding, and the second encoded audio information is further based on plural lossless mode coding processes that include an inverse MDCT and Golomb coding; and with the audio decoder, decoding at least one of the first encoded audio information and the second encoded audio information, wherein the second encoded audio information is decoded with plural decoding processes that include Golomb decoding and arithmetic decoding.

2. The method of claim 1 , further comprising outputting decoded audio information.

3. The method of claim 1 , wherein the decoding of at least the second audio information includes inverse noise shaping.

4. The method of claim 1 , wherein the Golomb decoding and the arithmetic decoding applied to the second audio information decode residual values to be combined with prediction values.

5. The method of claim 1 , wherein the plural lossy mode coding processes associated with the first audio information comprises non-rectangular windowing.

6. The method of claim 5 , wherein the non-rectangular windowing is based on a sine windowing function.

7. The method of claim 1 , wherein the decoding of the second audio information further comprises inverting noise shaping quantization.

8. The method of claim 1 , further comprising reconstructing a pulse code modulated frame based on at least one of the decoded first encoded audio information and the decoded second encoded audio information.

9. An audio processor, comprising: an input configured to receive first encoded audio information and second encoded audio information in a bit stream for audio in multiple channels, the first and second audio information having been encoded based on an MDCT of input audio data, wherein the first encoded audio information is further based on plural lossy mode coding processes that include perceptual weighting and entropy coding, and the second encoded audio information is further based on plural lossless mode coding processes that include an inverse MDCT and Golomb coding; and an audio decoder configured to decode at least one of the first encoded audio information and the second encoded information, wherein the audio decoder is configured to decode the second encoded information with plural decoding processes that include Golomb decoding and arithmetic decoding.

10. The audio processor of claim 9 , further comprising an output configured to receive reconstructed audio from the audio decoder.

11. The audio processor of claim 9 , wherein the Golomb decoding and the arithmetic decoding applied to the second audio information decode residual values and combine residual values with prediction values.

12. The audio processor of claim 9 , wherein the plural lossy mode coding processes associated with the first audio information comprises non-rectangular windowing.

13. The audio processor of claim 12 , wherein the non-rectangular windowing is based on a sine windowing function.

14. The audio processor of claim 9 , wherein the audio decoder is configured to invert noise shaping quantization associated with the second audio information.

15. The audio processor of claim 9 , wherein the audio decoder is configured to reconstruct a pulse code modulated frame based on at least one of the decoded first encoded audio information and the decoded second encoded audio information.

16. A computer-readable storage medium having computer-executable instructions thereon for executing on a computing device to effect an audio decoding method, the method comprising: receiving first encoded audio information and second encoded audio information in a bit stream for audio in multiple channels, the first and second audio information having been encoded based on an MDCT of input audio data, wherein the first encoded audio information is further based on plural lossy mode coding processes that include perceptual weighting and entropy coding, and the second encoded audio information is further based on plural lossless mode coding processes that include an inverse MDCT and Golomb coding; and decoding at least one of the first encoded audio information and the second encoded audio information, wherein the second encoded audio information is decoded with plural decoding processes that include Golomb decoding and arithmetic decoding.

17. The computer-readable storage medium of claim 16 , further comprising computer-executable instructions for outputting decoded audio information based on at least one of the first encoded audio information and the second encoded audio information.

18. The computer-readable storage medium of claim 17 , further comprising computer-executable instructions for reconstructing a pulse code modulated frame based on at least one of the decoded first encoded audio information and the decoded second encoded audio information.